I've always (well not always, maybe last 6-8 years) used a milwaukee cordless sawzall with a carbide tipped 6 or 8 tooth per inch 12 inch blade.
I also have the one handed "hackzall" from Milwaukee.
With the carbide tipped pruning blades they will destroy desert iron wood that you find in Arizona.
I spent a whole winter in Az warmed by mesquite and iron wood, all of it cut by my sawzalls.
Call me lazy, I have some bitchen axes and hand saws....but if I don't have to sweat for it I ain't gonna
BTW, I do have some chainsaws too, but noise and gas/oil just make it easier to grab a cordless.